If I was to buy... (Quad 405 Clone) - diyAudio
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Old 17th October 2010, 12:17 AM   #1
fusion is offline fusion  United Kingdom
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Join Date: Sep 2005
Default If I was to buy... (Quad 405 Clone)

I have been meaning to build a Quad amp clone such as the 606 or 405.

My technical experience isn't exactly great so I came across these kits on ebay -

Classic good sounds DIY QuaD 405 power AMP ,assembled~~ on eBay (end time 13-Nov-10 15:19:21 GMT)

As you can see its preassembled which should make life easier for me and its quite cheap. If I was to buy it what else do you think would be needed to make it work? And is it worth it?

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Old 17th October 2010, 06:16 AM   #2
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Join Date: Apr 2010
Location: Coffs Harbour
The circuit you posted is not the Quad 405. Check http://www.tcaas.btinternet.com/ and compare the language on what you posted...What, not English?....The original may well be improved by changes like this but bear in mind that people posting in other threads have not been all that enthusiastic about comparisons of this clone with the originals. I have built one set of amps identical to this one from "along1986090" and they certainly are reasonable quality boards and components but just not close enough to the original to give it that title IMHO.

BTW, These are very easy builds with no set-up requirements. The kit is otherwise just fine.

The parts are not as per originals either. There are other Ebay suppliers such as DIY Gene and Jims Audio Store who sell a PCB and kits using TO3 types as per original which may be a little closer, if that's what you want.

FWIW, you need everything else. A stereo pair producing 50W into eight ohms needs a DC power supply as specified with + and - rails on the site or schematic. Then, there are issues like controls for volume, input switching, perhaps a remote control preamp, an output protection relay and driver circuitry .....a lot more than just two basic amp electronics modules, depending somewhat on your actual needs. Now what about a case and making safe mains connections?

Last edited by Ian Finch; 17th October 2010 at 06:39 AM.
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Old 17th October 2010, 06:58 AM   #3
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Join Date: Apr 2010
Location: Coffs Harbour
Originally Posted by Ian Finch View Post
Sorry, wrong: http://www.tcaas.btinternet.co.uk ... according to Google.

Last edited by Ian Finch; 17th October 2010 at 07:01 AM.
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Old 17th October 2010, 09:29 PM   #4
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Join Date: Apr 2010
Location: Coffs Harbour
Nope..try Jan Dupont's site: Categorized Schematics and Service Manuals for free download
Note: There are already plenty of 405 threads and some on this same kit already. Just check the Forum search menu at the Solid state front page.

Last edited by Ian Finch; 17th October 2010 at 09:34 PM. Reason: add note
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